Clay-grinding machinery



(No Model.) 2 3heets---Shee't 1.

G. W. AULMANN. CLAY GRINDING MACHINERY.

No. 580,079. Patented Apr. 6, 1897.

l- I 1 W In??? I 4 I JL J1. 0: 5

I 1' 51" JR m \IWM 1l-,

(No Model.) 2 Sheet s-8heet 2. G. W. AULMANN.

CLAY GRINDING MAGHINERY.

No. 580,079. I Patented Apr. 6, 1897.

XMQ/VOCWWWW d \KA/Ww MQXQMTRM my UNITED STATES PATENT OFFICE.

GEORGE IV. AULMANN, OF DES MOINES, IOWA.

CLAY-GRINDING MACHINERY.

SPECIFICATION forming part of Letters Patent No. 580,079, dated April 6, 1897'.

Application filed anuary 31, 1896. Serial No. 577,646. (No model.)

To all whom it may concern.-

Be it known that I, GEoRcE W. AULMANN, a citizen of the United States of America, residing at Des Moines, in the county of Polk and State of Iowa, have invented certain new and useful Improvements in Clay-Grinding Machinery, of which the following is a specification.

My improvement relates to that class of clay-grinding machines in which one or more rollers are rotatably mounted in suitable bearings and suspended from a frame and relative to a pan adapted to receive lumps of clay or the like and subjected to the pressure of the rollers to be crushed.

My invention consists in the construction, arrangement, and combination of the means for independentlysupporting rollers, as hereinafter set forth, pointed out in my claim, and illustrated in the accompanying drawings, in Which Figure 1 is a horizontal sectional view of the machine, taken through a line near the top of the frame. Fig. 2 is a vertical sectional view through the central portion of the machine.

Referring to the accompanying drawings, the reference-letter A indicates a pan mounted on the shaft A and adapted to receive lumps of clay and be rotated to bring said lumps under the rollers to be ground.

The supporting-frame of the machine is composed of the A-shaped uprights B B and the cross-piece 13 that connects their top portions.

0 0 indicate two shafts extended horizontally between the end pieces B and fixed thereto in parallel position for the purpose of supportingthe crushing-wheels. 0 indicate said wheels, which are preferably made of cast metal and heavy enough to crush lumps of clay by their weight.

D indicates a yoke having a sleeve D formed on or fixed to its inner end and adapted to be placed on one of the shafts or rods 0. The free ends of the yoke are provided with bearings for the axles of the wheels. Bifurcated extensions D are formed on the said free ends for purposes hereinafter explained.

F are stirrup-shaped hangers placed astride the wheels 0 and pivotally attached to the bifurcated ends D of the yokes. The top and center of each yoke is provided with an opening coinciding with a corresponding opening in the cross-piece D Straight bars or rods H, provided with heads, are extended through said coinciding openings and secured to the yokes F by means of nuts.

J indicates a coil-spring surrounding the upper end of the bolt H and interposed between the said cross-piece B of the frame and the head of the bolt H to normally hold the wheel elevated a slight distance above the pan and to prevent concussion when the roller comes in contact with the pan.

It is obvious that the yokes, as constructed and combined with the frame, will prevent the rollers from moving laterally, so as to always retain them in line of rotation of the pan and be capable of a free vertical movement and that the rollers will have independent vertical motion.

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent of the United States therefor, is

In a machine for grinding clay, a frame adapted to support rollers in a pan, composed of upright end pieces, and a cross-piece fixed to their top portions, shafts attached in parallel position to the end pieces, yokes composed of parallel bars fixed to the end portions of a sleeve fitted on said shafts, and stirrups or hangers for rollers pivotally connected with the free ends of the yokes and suspended from the cross-piece of the frame by means of bolts, and coiled springs interposed between the heads of the bolts and the said cross-piece, all arranged and combined to operate in the manner set forth.

GEORGE W. AULMANN. YVitnesses.

J. RALPH ORWIG, THOMAS G. ORWIG. 

